Implement multibar UI

Multiplexed download requires ability to draw UI for multiple active progress
bars. To implement it we use ANSI codes to move cursor up/down and then
redraw the required progress bar.
`pacman_multibar_ui.active_downloads` field represents the list of active
downloads that correspond to progress bars.
`struct pacman_progress_bar` is a data structure for a progress bar.

In some cases (e.g. database downloads) we want to keep progress bars in order.
In some other cases (package downloads) we want to move completed items to the
top of the screen. Function `multibar_move_completed_up` allows to configure
such behavior.

Per discussion in the maillist we do not want to show download progress for
signature files.

Signed-off-by: Anatol Pomozov <anatol.pomozov@gmail.com>
Signed-off-by: Allan McRae <allan@archlinux.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/pacman/sync.c b/src/pacman/sync.c
index f7dcb958..a05af5da 100644
--- a/src/pacman/sync.c
+++ b/src/pacman/sync.c
@@ -35,6 +35,7 @@
 #include "pacman.h"
 #include "util.h"
 #include "package.h"
+#include "callback.h"
 #include "conf.h"
 
 static int unlink_verbose(const char *pathname, int ignore_missing)
@@ -824,6 +825,7 @@ int sync_prepare_execute(void)
 		goto cleanup;
 	}
 
+	multibar_move_completed_up(true);
 	if(alpm_trans_commit(config->handle, &data) == -1) {
 		alpm_errno_t err = alpm_errno(config->handle);
 		pm_printf(ALPM_LOG_ERROR, _("failed to commit transaction (%s)\n"),